<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{

    /**
     * Authenticates a user.
     * The example implementation makes sure if the username and password
     * are both 'demo'.
     * In practical applications, this should be changed to authenticate
     * against some persistent user identity storage (e.g. database).
     * @return boolean whether authentication succeeds.
     */
    public function authenticate()
    {
        $users = Admin::model()->findByAttributes(array('username' => $this->username));
        if (!is_null($users))
        {
            if ($users->username == null)
                $this->errorCode = self::ERROR_USERNAME_INVALID;
            elseif ($users->password !== $this->password)
                $this->errorCode = self::ERROR_PASSWORD_INVALID;
            else
            {
                Yii::app()->user->name = $users->username;
                $this->errorCode = self::ERROR_NONE;
            }
        }
        else
        {
            $this->errorCode = self::ERROR_USERNAME_INVALID;
        }
        
        return !$this->errorCode;
    }

}